package com.itheima.reggie.service.impl;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.AddressBookMapper;
import com.itheima.reggie.mapper.OrdersMapper;
import com.itheima.reggie.mapper.ShoppingCartMapper;
import com.itheima.reggie.mapper.UserMapper;
import com.itheima.reggie.service.OrderDetailService;
import com.itheima.reggie.service.OrdersService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private OrderDetailService orderDetailService;

    @Transactional
    @Override
    public void submit(Orders orders) {
            Long userId = BaseContext.getCurrentId();
            LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.eq(ShoppingCart::getUserId, userId);
            List<ShoppingCart> shoppingCarts = shoppingCartMapper.selectList(queryWrapper);
            if (shoppingCarts == null || shoppingCarts.size() == 0) {
                throw new CustomException("购物车为空，无法下单");
            }
            User user = userMapper.selectById(userId);

            AddressBook addressBook = addressBookMapper.selectById(orders.getAddressBookId());
            if (addressBook == null) {
                throw new CustomException("用户地址信息有误，无法下单");
            }
            long orderId = IdWorker.getId();
            AtomicInteger amount = new AtomicInteger(0);
            List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
                OrderDetail orderDetail = new OrderDetail();
                orderDetail.setOrderId(orderId);
                orderDetail.setNumber(item.getNumber());
                orderDetail.setDishFlavor(item.getDishFlavor());
                orderDetail.setDishId(item.getDishId());
                orderDetail.setSetmealId(item.getSetmealId());
                orderDetail.setName(item.getName());
                orderDetail.setImage(item.getImage());
                orderDetail.setAmount(item.getAmount());
                amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue()); // +=
                return orderDetail;
            }).collect(Collectors.toList());
            orders.setId(orderId);
            orders.setOrderTime(LocalDateTime.now());
            orders.setCheckoutTime(LocalDateTime.now());
            orders.setStatus(2);
            orders.setAmount(new BigDecimal(amount.get()));
            orders.setUserId(userId);
            orders.setNumber(String.valueOf(orderId));
            //orders.setUserName(user.getName());
            orders.setConsignee(addressBook.getConsignee());
            orders.setPhone(addressBook.getPhone());
            orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                    + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                    + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                    + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
            this.save(orders);
            orderDetailService.saveBatch(orderDetails);
            shoppingCartMapper.delete(queryWrapper);
        }
    }

